On 14/3/22 06:47, 'Andrey Sychev' via Brewtus wrote:
Seems I need to test performance of static relay so diagnose machine not maintaining temperature. Can someone point me to where this part is in B2? The video on WLL shoes a part that doesn’t exist on my machine. Attached is B4 parts diagram from WLL. Thanks.
Hi Andrey. Sorry I haven't been on-list for a while, had an accident and am only just back now :(
The "static relay" is actually a "Solid State Relay" or SSR. It is located (on my Minore-II, a 240VAC version, so it *might* differ!) beneath the tank. You have to remove the metal tank support thingy and you'll find it attached to the bottom of the machine. The casing is a heat sink for it. If I built it, there would be thermal grease between the case and the bottom of the SSR, so don't remove it unless you need to! It should also have a clip-on transparent plastic cover over it.
My SSR has (as do most) a red LED at the low voltage DC control side. When it is lit, the AC connection is made. BE CAREFUL. If you have a mains type meter, you can check by connecting one meter probe to a mains neutral connection, and the other to the switched side of the SSR. One of the two terminals will always be live and the other should come on when the LED lights. If there is no LED, you just need to check it comes on sometime!
SSRs are standard electronic fare. If you need a new one, get one with a suitable current rating and it'll be fine. The ONLY minor wriggle is some do "zero cross switching" and some don't. Get a zero cross detect version. Do NOT buy cheap ones from ebay though - they will be branded FOTEK (an excellent manufacturer) but tend to be copies that make use of 8 amp triacs rather than 10, 20 or 40 amp ones!
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